EP1249262A1 - Honeycomb structure - Google Patents

Honeycomb structure Download PDF

Info

Publication number
EP1249262A1
EP1249262A1 EP01900653A EP01900653A EP1249262A1 EP 1249262 A1 EP1249262 A1 EP 1249262A1 EP 01900653 A EP01900653 A EP 01900653A EP 01900653 A EP01900653 A EP 01900653A EP 1249262 A1 EP1249262 A1 EP 1249262A1
Authority
EP
European Patent Office
Prior art keywords
honeycomb structure
honeycomb
cross
structure according
segment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01900653A
Other languages
German (de)
French (fr)
Other versions
EP1249262B1 (en
EP1249262A4 (en
Inventor
Takashi NGK Insulators Ltd. HARADA
Yukio NGK Insulators Ltd. MIYAIRI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NGK Insulators Ltd
Original Assignee
NGK Insulators Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=18533750&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1249262(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by NGK Insulators Ltd filed Critical NGK Insulators Ltd
Publication of EP1249262A1 publication Critical patent/EP1249262A1/en
Publication of EP1249262A4 publication Critical patent/EP1249262A4/en
Application granted granted Critical
Publication of EP1249262B1 publication Critical patent/EP1249262B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2425—Honeycomb filters characterized by parameters related to the physical properties of the honeycomb structure material
    • B01D46/2429—Honeycomb filters characterized by parameters related to the physical properties of the honeycomb structure material of the honeycomb walls or cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2425—Honeycomb filters characterized by parameters related to the physical properties of the honeycomb structure material
    • B01D46/2448—Honeycomb filters characterized by parameters related to the physical properties of the honeycomb structure material of the adhesive layers, i.e. joints between segments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2425—Honeycomb filters characterized by parameters related to the physical properties of the honeycomb structure material
    • B01D46/24494—Thermal expansion coefficient, heat capacity or thermal conductivity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2425—Honeycomb filters characterized by parameters related to the physical properties of the honeycomb structure material
    • B01D46/24495—Young's modulus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2455—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure of the whole honeycomb or segments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2466—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure of the adhesive layers, i.e. joints between segments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/247—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure of the cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2478—Structures comprising honeycomb segments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2482—Thickness, height, width, length or diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2484—Cell density, area or aspect ratio
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2486—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure characterised by the shapes or configurations
    • B01D46/2488—Triangular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2486—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure characterised by the shapes or configurations
    • B01D46/249—Quadrangular e.g. square or diamond
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2486—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure characterised by the shapes or configurations
    • B01D46/2492—Hexagonal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/88—Handling or mounting catalysts
    • B01D53/885—Devices in general for catalytic purification of waste gases
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/0006—Honeycomb structures
    • C04B38/0016—Honeycomb structures assembled from subunits
    • C04B38/0019—Honeycomb structures assembled from subunits characterised by the material used for joining separate subunits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/011—Exhaust or silencing apparatus characterised by constructional features having two or more purifying devices arranged in parallel
    • F01N13/017—Exhaust or silencing apparatus characterised by constructional features having two or more purifying devices arranged in parallel the purifying devices are arranged in a single housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0222—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2825—Ceramics
    • F01N3/2828—Ceramic multi-channel monoliths, e.g. honeycombs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional [3D] monoliths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00793—Uses not provided for elsewhere in C04B2111/00 as filters or diaphragms
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0081—Uses not provided for elsewhere in C04B2111/00 as catalysts or catalyst carriers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/10—Exhaust treating devices having provisions not otherwise provided for for avoiding stress caused by expansions or contractions due to temperature variations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2370/00—Selection of materials for exhaust purification
    • F01N2370/02—Selection of materials for exhaust purification used in catalytic reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2370/00—Selection of materials for exhaust purification
    • F01N2370/22—Selection of materials for exhaust purification used in non-catalytic purification apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/28—Methods or apparatus for fitting, inserting or repairing different elements by using adhesive material, e.g. cement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • F01N2510/065—Surface coverings for exhaust purification, e.g. catalytic reaction for reducing soot ignition temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/30—Exhaust treatment

Definitions

  • the present invention relates to a honeycomb structure used as a filter which collects and removes particulate matters exhausted in a heat engine such as an internal combustion engine or combustion equipment such as a boiler.
  • the present invention has been made to solve the above problems, and accordingly an object thereof is to provide a honeycomb structure in which a less thermal stress occurs during the use; durability such that no crack develops is ensured; a difference in temperature between the central portion and the outer peripheral portion is less liable to be produced; the pressure loss of fluid is low; and the time and energy necessary for the rise in temperature at the time of regenerating treatment are less.
  • a honeycomb structure including two or more honeycomb segments each of which has a large number of through channels which are partitioned by walls and penetrate in the axial direction, the wall of the through channel having a filtering function, and is constructed so that one end is clogged for predetermined through channels, and the other end is clogged for the remaining through channels, and a joint layer for joining the two or more honeycomb segments to each other, characterized in that at least either that the Young's modulus of material of the joint layer is 20% or less of the Young's modulus of material of the honeycomb segment, or that the material strength of the joint layer is lower than the material strength of the honeycomb segment is satisfied.
  • a portion having an area of at least 30% of the surface area of the honeycomb segment in contact with the joint layer preferably has average surface roughness Ra exceeding 0.4 micron, and the ratio of the total heat capacity of all the joint layers in the honeycomb structure to the total heat capacity of all the honeycomb segments constituting the honeycomb structure is preferably 30% or lower.
  • a corner portion of a cross-sectional shape of the honeycomb segment in the cross section perpendicular to the through channel of the honeycomb structure be rounded with a radius of curvature of 0.3 mm or larger, or be chamfered 0.5 mm or more.
  • the ratio of the total cross-sectional area of the joint layers to the cross-sectional area of the honeycomb structure in the cross section perpendicular to the through channel of the honeycomb structure is preferably 17% or lower, and further the ratio of the sum of the cross-sectional areas of the joint layers to the sum of the cross-sectional areas of the walls in the cross section of honeycomb structure perpendicular to the through channel of the honeycomb structure is preferably 50% or lower.
  • the ratio of the cross-sectional area of joint layer to the cross-sectional area of wall in the cross section of honeycomb structure perpendicular to the through channel of the honeycomb structure be higher in the central portion and be lower on the outer peripheral side.
  • one kind of material selected from a group consisting of cordierite, SiC, SiN, alumina, mullite, and lithium aluminum silicate (LAS) is preferably used as a main crystal phase from the viewpoint of strength, heat resistance, and the like.
  • the honeycomb segment carry a metal having a catalytic function so as to be used to purify exhaust gas from a heat engine or combustion equipment or to reform a liquid fuel or a gas fuel.
  • a metal having a catalytic function at least one kind of Pt, Pd, and Rh is preferably used.
  • cross-sectional shape of the through channel in the honeycomb structure is preferably any of triangle, quadrangle, and hexagon.
  • Figures 1(a), 1(b), 1(c) and 1(d) are explanatory views showing various division patterns of honeycomb segment of a honeycomb structure in accordance with the present invention.
  • reference numeral 10 denotes a honeycomb structure.
  • the honeycomb structure 10 is made up of two or more honeycomb segments 11 and joint layers 12 for joining these honeycomb segments 11.
  • the honeycomb segment 11 has a large number of through channels 15 which are partitioned by walls 14 and penetrate in the axial direction.
  • the wall 14 of the through channel 15 has a filtering function, and the construction is such that one end is clogged for predetermined through channels 15, and the other end is clogged for the remaining through channels 15.
  • the Young's modulus of a material forming the joint layer 12 is made preferably 20% or less more preferably 1% or less of the Young's modulus of a material forming the honeycomb segment 11, or the material strength of the joint layer 12 is made lower than the material strength of the honeycomb segment 11.
  • the Young's modulus of the joint layer 12 exceeds 20% of the Young's modulus of the honeycomb segment 11, if the material strength of the joint layer 12 is lower than the material strength of the honeycomb segment 11, a crack develops only in the joint layer 12, and the honeycomb segment 11 is not damaged, so that the honeycomb structure maintains a sufficient function.
  • the Young's modulus of the joint layer 12 and the Young's modulus of the honeycomb segment 11 means the Young's modulus of each material itself thereof, that is, the physical property inherent in the material.
  • a test piece 20 cut out of the honeycomb structure in accordance with the present invention as shown in Figure 5 is prepared.
  • the test piece 20 is cut so that the length in the direction perpendicular to the through channel is 40 mm or larger and the joint layer 12 is located in the center thereof.
  • the fact that in a four-point bending test (in conformity to JIS R1601) as shown in Figure 6 of the test piece 20, the probability that a fracture occurs within the joint layer 12 or at the interface between the joint layer 12 and the honeycomb segment 11 is 50% or higher is defined as the aforementioned "the material strength of the joint layer is lower than the material strength of the honeycomb segment".
  • a portion having an area of at least 30% of the surface area of the honeycomb segment 11 in contact with the joint layer 12 have average surface roughness Ra exceeding 0.4 micron.
  • the aforementioned surface roughness Ra is further preferably be 0.8 microns or more.
  • the ratio of the total heat capacity of all the joint layers in the honeycomb structure to the total heat capacity of all the honeycomb segments constituting the honeycomb structure is preferably made 30% or lower, more preferably 15% or lower.
  • a corner portion of a cross-sectional shape of honeycomb segment in the cross section perpendicular to the through channel of honeycomb structure be rounded with a radius of curvature of 0.3 mm or larger, or be chamfered 0.5 mm or more because the occurrence of thermal stress at the time of use is reduced and great durability such that no crack develops can be given to the honeycomb structure.
  • the ratio of the total cross-sectional area of the joint layers to the cross-sectional area of the honeycomb structure in the cross section perpendicular to the through channel of honeycomb structure be 17% or lower, more preferably 8% or lower.
  • the total cross-sectional area S S of the joint layers 12 is the total area of hatched portion A in Figure 3 (cross-sectional portion of the joint layers 12).
  • the ratio of S S /S H should preferably be 17% or lower from the viewpoint of the decrease in pressure loss of fluid.
  • the ratio of the sum of the cross-sectional areas of joint layers to the sum of the cross-sectional areas of walls in the cross section of honeycomb structure perpendicular to the through channel of honeycomb structure be 50% or lower, more preferably 24% or lower.
  • the ratio of S S /S C should preferably be 50% or lower from the viewpoint of the decrease in pressure loss of fluid.
  • the ratio of the cross-sectional area of joint layer to the cross-sectional area of wall in the cross section of honeycomb structure perpendicular to the through channel of honeycomb structure be higher in the central portion and be lower on the outer peripheral side.
  • the quantity of collected carbon particulates per unit volume is smaller in the vicinity of the center than in the vicinity of the outer periphery, so that at the time of regenerating treatment at which carbon particulates are burned (regenerative combustion time), the calorific value in the vicinity of the center, where high temperatures are liable to be generated, can be kept low.
  • the joint layer in the vicinity of the center is dense, so that the heat capacity in that portion can be increased. For these reasons, the increase in temperature in the vicinity of the center can be kept low. As a result, a difference in temperature between the central portion and the outer peripheral side can be decreased, so that the thermal stress in the honeycomb structure can desirably be decreased.
  • the cross section perpendicular to the through channel of honeycomb structure can take various shapes such as circle, ellipse, and racetrack.
  • the honeycomb segment constituting the honeycomb structure in accordance with the present invention preferably has a main crystal phase of one kind selected from a group consisting of cordierite, SiC, SiN, alumina, mullite, and lithium aluminum silicate (LAS) from the viewpoint of strength, heat resistance, and the like.
  • LAS lithium aluminum silicate
  • Silicon carbide (SiC) which has a high coefficient of thermal conductivity, is especially preferable because heat can be dissipated easily.
  • the cell density of honeycomb segment is preferably 6 to 1500 cells/in 2 (0.9 to 233 cells/cm 2 ), further preferably 50 to 400 cells/in 2 (7.8 to 62 cells/cm 2 ). If the cell density is lower than 6 cells/in 2 , the strength and effective GSA (Geometrical Surface Area) are insufficient as the honeycomb segment. If the cell density is higher than 1500 cells/in 2 , the pressure loss increases when gas flows.
  • GSA Geographical Surface Area
  • cross-sectional shape of through channel (cell shape) in the honeycomb structure is preferably any of triangle, quadrangle, and hexagon from the viewpoint of manufacture.
  • joint layer As a material of joint layer that joins the honeycomb segment to each other, ceramic fiber, ceramic powder, cement, or the like, which has heat resistance, are preferably used singly or by being mixed. Further, as necessary, an organic binder, an inorganic binder, etc. may be used by being mixed.
  • the material of joint layer is not limited to the above-described materials.
  • the honeycomb structure in accordance with the present invention has a construction such that, as described above, it has a large number of through channels which are partitioned by walls and penetrate in the axial direction; the wall of the through channel has a filtering function; and one end is clogged for predetermined through channels, and the other end is clogged for the remaining through channels. Therefore, the honeycomb structure can be suitably used as a filter which collects and removes particulate matters contained in a dust-containing fluid, such as a particulate filter for a diesel engine.
  • a dust-containing fluid is caused to pass through one end face of the honeycomb structure having such a construction, the dust-containing fluid enters a through channel in the honeycomb structure whose end on the one end face side is not clogged, and passes through the porous wall having a filtering function to enter another through channel in the honeycomb structure whose end on the other end face side is not clogged.
  • the porous wall having a filtering function to enter another through channel in the honeycomb structure whose end on the other end face side is not clogged.
  • the honeycomb structure is heated periodically by heating means such as a heater to burn and remove the particulate matters, by which the filtering function is regenerated.
  • heating means such as a heater to burn and remove the particulate matters, by which the filtering function is regenerated.
  • a metal having a catalytic function as described later, may be carried on the honeycomb segment.
  • the honeycomb structure in accordance with the present invention is used to purify exhaust gas from a heat engine such as an internal combustion engine or to reform a liquid fuel or a gas fuel as a catalyst carrier
  • a metal having a catalytic function is carried on the honeycomb segment.
  • Pt, Pd, and Rh are cited. At least one kind of these metals is preferably carried on the honeycomb segment.
  • Honeycomb structures measuring 144 mm in diameter and 153 mm in length having various division constructions were manufactured using a SiC-made honeycomb segment having a wall thickness of 0.38 mm, a cell density of 200 cells/in 2 (31 cells/cm 2 ), and a thickness of outer peripheral portion of 0.5 mm, and using a mixture of ceramic fiber, ceramic powder, and organic and inorganic binders as the joint layer.
  • the division construction and the properties such as the Young's modulus of material of the obtained honeycomb structure are given in Table 1.
  • the surface roughness given in Table 1 indicates the average surface roughness of the whole surface of honeycomb segment in contact with the joint layer.
  • This honeycomb structure is a particulate filter for purifying exhaust gas from a diesel engine, which has a construction such that one end is clogged for predetermined through channels, and the other end is clogged for the remaining through channels.
  • the fluid pressure loss test and the regeneration test were conducted on these honeycomb structures. The results are given in Table 1.
  • the honeycomb structure in accordance with the present invention achieves a remarkable effect that a less thermal stress occurs during the use; durability such that no crack develops is ensured; a difference in temperature between the central portion and the outer peripheral portion hardly occurs; and moreover the pressure loss of fluid is low.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Toxicology (AREA)
  • Materials Engineering (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Filtering Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Catalysts (AREA)

Abstract

This is directed to a honeycomb structure (10) including two or more honeycomb segments (11) having numerous through channels having been partitioned by walls and penetrating in axial direction thereof, the walls for through channels having a filtering function, and one end being clogged at predetermined through channels, and the other end at the remaining ones, and joint layers (12) for joining two or more honeycomb segments (11) each other. It may satisfy at least either that the Young's modulus of material of the joint layer (12) is 20% or less of that of the honeycomb segment (11), or that the material strength of joint layer (12) is lower than that of the honeycomb segment (11). This honeycomb structure shows a less thermal stress during use, has such a durability that no crack is formed, hardly shows a difference in temperature between the central portion and outer peripheral portion, and shows a lower pressure loss of fluid.

Description

Technical Field
The present invention relates to a honeycomb structure used as a filter which collects and removes particulate matters exhausted in a heat engine such as an internal combustion engine or combustion equipment such as a boiler.
Background Art
Conventionally, as a method for collecting and removing particulate matters contained in a dust-containing fluid such as exhaust gas emitted from a diesel engine or the like, there is known the use of a honeycomb structure in which a wall of through channel has a filtering function, one end is clogged for predetermined through channels, and the other end is clogged for the remaining through channels.
In the case where such a honeycomb structure is used as a filter for collecting particulate matters in exhaust gas, it is necessary to perform regenerating treatment in which accumulating carbon particulates are burned and removed. At this time, a local increase in temperature is unavoidable, so that a high thermal stress is liable to occur, which poses a problem in that a crack is liable to develop.
As measures for reducing the thermal stress occurring in such a structural part, a method in which the structural part is divided into small segments is known. The use of a honeycomb structure for collecting particulates in exhaust gas has already been proposed in JP-A-6-241017, JP-A-8-28246, JP-A-7-54643, JP-A-8-28248. etc.
However, even in the examples proposed in the aforementioned patent publications, the effect of reducing stress on segment surface is insufficient, and the problem of crack development cannot be solved completely. Also, there is a problem in that a shift in axial direction occurs between the segments during the use. Although a method in which a holding member is used to prevent the shift in the axial direction has been proposed in JP-A-6-241017, there is a problem of deformation and deterioration of the holding member occurring when the member is subject to high temperatures of exhaust gas.
As other measures for reducing thermal stress, there has been proposed a method in which a portion liable to have a relatively low temperature is heated electrically by providing an electric heater between the segments to make the temperature distribution in honeycomb structure uniform. However, this method has a problem of the occurrence of a new thermal stress because a local temperature gradient rather increases in the vicinity of the electric heater.
Also, there are a problem in that the ratio of the joint layer between the segments to the cross section is too high, so that the pressure loss of fluid is excessive, which deteriorates the engine performance, and a problem in that the heat capacity is too high, so that the rise in temperature takes much time in the regenerating treatment in which carbon particulates are burned to be removed, which prolongs the time necessary for regenerating treatment.
The present invention has been made to solve the above problems, and accordingly an object thereof is to provide a honeycomb structure in which a less thermal stress occurs during the use; durability such that no crack develops is ensured; a difference in temperature between the central portion and the outer peripheral portion is less liable to be produced; the pressure loss of fluid is low; and the time and energy necessary for the rise in temperature at the time of regenerating treatment are less.
Disclosure of the Invention
According to the present invention, there is provided a honeycomb structure including two or more honeycomb segments each of which has a large number of through channels which are partitioned by walls and penetrate in the axial direction, the wall of the through channel having a filtering function, and is constructed so that one end is clogged for predetermined through channels, and the other end is clogged for the remaining through channels, and a joint layer for joining the two or more honeycomb segments to each other, characterized in that at least either that the Young's modulus of material of the joint layer is 20% or less of the Young's modulus of material of the honeycomb segment, or that the material strength of the joint layer is lower than the material strength of the honeycomb segment is satisfied.
In the present invention, a portion having an area of at least 30% of the surface area of the honeycomb segment in contact with the joint layer preferably has average surface roughness Ra exceeding 0.4 micron, and the ratio of the total heat capacity of all the joint layers in the honeycomb structure to the total heat capacity of all the honeycomb segments constituting the honeycomb structure is preferably 30% or lower.
Further, in the honeycomb structure in accordance with the present invention, it is preferable that a corner portion of a cross-sectional shape of the honeycomb segment in the cross section perpendicular to the through channel of the honeycomb structure be rounded with a radius of curvature of 0.3 mm or larger, or be chamfered 0.5 mm or more.
Also, the ratio of the total cross-sectional area of the joint layers to the cross-sectional area of the honeycomb structure in the cross section perpendicular to the through channel of the honeycomb structure is preferably 17% or lower, and further the ratio of the sum of the cross-sectional areas of the joint layers to the sum of the cross-sectional areas of the walls in the cross section of honeycomb structure perpendicular to the through channel of the honeycomb structure is preferably 50% or lower. Sill further, it is preferable that the ratio of the cross-sectional area of joint layer to the cross-sectional area of wall in the cross section of honeycomb structure perpendicular to the through channel of the honeycomb structure be higher in the central portion and be lower on the outer peripheral side.
As a material of the honeycomb segment, one kind of material selected from a group consisting of cordierite, SiC, SiN, alumina, mullite, and lithium aluminum silicate (LAS) is preferably used as a main crystal phase from the viewpoint of strength, heat resistance, and the like.
Also, it is preferable that the honeycomb segment carry a metal having a catalytic function so as to be used to purify exhaust gas from a heat engine or combustion equipment or to reform a liquid fuel or a gas fuel. As the metal having a catalytic function, at least one kind of Pt, Pd, and Rh is preferably used.
Further, the cross-sectional shape of the through channel in the honeycomb structure is preferably any of triangle, quadrangle, and hexagon.
Brief Description of the Drawings
  • Figures 1(a), 1(b), 1(c) and 1(d) are explanatory views showing various division patterns of honeycomb segment of a honeycomb structure in accordance with the present invention.
  • Figure 2 is a partially enlarged view showing a cell construction of a honeycomb structure.
  • Figure 3 is a sectional view for illustrating one example of a honeycomb structure.
  • Figure 4 is a partially enlarged view showing a cell construction and a joint layer of a honeycomb structure.
  • Figure 5 is a perspective view showing one example of a test piece cut out of a honeycomb structure.
  • Figure 6 is an explanatory view showing an example of a four-point bending test.
    • Best Mode for Carrying out the Invention
    The present invention will now be described in further detail with reference to an embodiment shown in the accompanying drawings. The present invention is not limited to this embodiment.
    Figures 1(a), 1(b), 1(c) and 1(d) are explanatory views showing various division patterns of honeycomb segment of a honeycomb structure in accordance with the present invention.
    In Figures 1(a), 1(b), 1(c) and 1(d), reference numeral 10 denotes a honeycomb structure. The honeycomb structure 10 is made up of two or more honeycomb segments 11 and joint layers 12 for joining these honeycomb segments 11. Though not shown in detail, the honeycomb segment 11 has a large number of through channels 15 which are partitioned by walls 14 and penetrate in the axial direction. The wall 14 of the through channel 15 has a filtering function, and the construction is such that one end is clogged for predetermined through channels 15, and the other end is clogged for the remaining through channels 15.
    In the honeycomb structure in accordance with the present invention, the Young's modulus of a material forming the joint layer 12 is made preferably 20% or less more preferably 1% or less of the Young's modulus of a material forming the honeycomb segment 11, or the material strength of the joint layer 12 is made lower than the material strength of the honeycomb segment 11. By specifying the Young's moduli of materials of the joint layer 12 and the honeycomb segment 11, a honeycomb structure in which a less thermal stress occurs during the use, and durability such that no crack develops is ensured can be provided. Also, even in the case where the Young's modulus of the joint layer 12 exceeds 20% of the Young's modulus of the honeycomb segment 11, if the material strength of the joint layer 12 is lower than the material strength of the honeycomb segment 11, a crack develops only in the joint layer 12, and the honeycomb segment 11 is not damaged, so that the honeycomb structure maintains a sufficient function.
    Herein, the Young's modulus of the joint layer 12 and the Young's modulus of the honeycomb segment 11 means the Young's modulus of each material itself thereof, that is, the physical property inherent in the material.
    Also, the definition of "the material strength of the joint layer is lower than the material strength of the honeycomb segment" will be explained below with reference to Figures 5 and 6.
    A test piece 20 cut out of the honeycomb structure in accordance with the present invention as shown in Figure 5 is prepared. The test piece 20 is cut so that the length in the direction perpendicular to the through channel is 40 mm or larger and the joint layer 12 is located in the center thereof. In the present invention, the fact that in a four-point bending test (in conformity to JIS R1601) as shown in Figure 6 of the test piece 20, the probability that a fracture occurs within the joint layer 12 or at the interface between the joint layer 12 and the honeycomb segment 11 is 50% or higher is defined as the aforementioned "the material strength of the joint layer is lower than the material strength of the honeycomb segment".
    Also, it is preferable that in this honeycomb structure, a portion having an area of at least 30% of the surface area of the honeycomb segment 11 in contact with the joint layer 12 have average surface roughness Ra exceeding 0.4 micron. Thereby, the two or more honeycomb segments 11 are joined more firmly, and a fear of peeling off at the time of use can almost be dispelled. The aforementioned surface roughness Ra is further preferably be 0.8 microns or more.
    Also, the ratio of the total heat capacity of all the joint layers in the honeycomb structure to the total heat capacity of all the honeycomb segments constituting the honeycomb structure is preferably made 30% or lower, more preferably 15% or lower. Thereby, when the carbon particulates collected at the time of regeneration are burned to be disposed of (filter regeneration), the time taken for the rise in temperature can desirably be kept in the allowable range.
    Further, it is preferable that in the honeycomb structure in accordance with the present invention, a corner portion of a cross-sectional shape of honeycomb segment in the cross section perpendicular to the through channel of honeycomb structure be rounded with a radius of curvature of 0.3 mm or larger, or be chamfered 0.5 mm or more because the occurrence of thermal stress at the time of use is reduced and great durability such that no crack develops can be given to the honeycomb structure.
    Still further, in the present invention, it is preferable that the ratio of the total cross-sectional area of the joint layers to the cross-sectional area of the honeycomb structure in the cross section perpendicular to the through channel of honeycomb structure be 17% or lower, more preferably 8% or lower. The explanation of this is given with reference to Figure 3. Referring to Figure 3, in the circular honeycomb structure 10 having a cross section with diameter D, the total cross-sectional area SH of the honeycomb structure 10 is expressed by the following formula. SH = (π/4) × D2 On the other hand, the total cross-sectional area SS of the joint layers 12 is the total area of hatched portion A in Figure 3 (cross-sectional portion of the joint layers 12).
    Herein, the ratio of SS/SH should preferably be 17% or lower from the viewpoint of the decrease in pressure loss of fluid.
    Also, in the present invention, it is preferable that the ratio of the sum of the cross-sectional areas of joint layers to the sum of the cross-sectional areas of walls in the cross section of honeycomb structure perpendicular to the through channel of honeycomb structure be 50% or lower, more preferably 24% or lower. Referring to Figure 4, taking the sum of the cross-sectional areas (hatched portion B) of the joint layers 12 in the cross section of the honeycomb structure 10 as SS, and taking the sum of the cross-sectional areas (meshed portion C) of the walls 14 as SC, the ratio of SS/SC should preferably be 50% or lower from the viewpoint of the decrease in pressure loss of fluid.
    Further, in the present invention, it is preferable that the ratio of the cross-sectional area of joint layer to the cross-sectional area of wall in the cross section of honeycomb structure perpendicular to the through channel of honeycomb structure be higher in the central portion and be lower on the outer peripheral side. According to such configuration, the quantity of collected carbon particulates per unit volume is smaller in the vicinity of the center than in the vicinity of the outer periphery, so that at the time of regenerating treatment at which carbon particulates are burned (regenerative combustion time), the calorific value in the vicinity of the center, where high temperatures are liable to be generated, can be kept low. Moreover, the joint layer in the vicinity of the center is dense, so that the heat capacity in that portion can be increased. For these reasons, the increase in temperature in the vicinity of the center can be kept low. As a result, a difference in temperature between the central portion and the outer peripheral side can be decreased, so that the thermal stress in the honeycomb structure can desirably be decreased.
    In the present invention, the cross section perpendicular to the through channel of honeycomb structure can take various shapes such as circle, ellipse, and racetrack.
    Also, the honeycomb segment constituting the honeycomb structure in accordance with the present invention preferably has a main crystal phase of one kind selected from a group consisting of cordierite, SiC, SiN, alumina, mullite, and lithium aluminum silicate (LAS) from the viewpoint of strength, heat resistance, and the like. Silicon carbide (SiC), which has a high coefficient of thermal conductivity, is especially preferable because heat can be dissipated easily.
    The cell density of honeycomb segment is preferably 6 to 1500 cells/in2 (0.9 to 233 cells/cm2), further preferably 50 to 400 cells/in2 (7.8 to 62 cells/cm2). If the cell density is lower than 6 cells/in2, the strength and effective GSA (Geometrical Surface Area) are insufficient as the honeycomb segment. If the cell density is higher than 1500 cells/in2, the pressure loss increases when gas flows.
    Also, the cross-sectional shape of through channel (cell shape) in the honeycomb structure is preferably any of triangle, quadrangle, and hexagon from the viewpoint of manufacture.
    Also, as a material of joint layer that joins the honeycomb segment to each other, ceramic fiber, ceramic powder, cement, or the like, which has heat resistance, are preferably used singly or by being mixed. Further, as necessary, an organic binder, an inorganic binder, etc. may be used by being mixed. The material of joint layer is not limited to the above-described materials.
    The honeycomb structure in accordance with the present invention has a construction such that, as described above, it has a large number of through channels which are partitioned by walls and penetrate in the axial direction; the wall of the through channel has a filtering function; and one end is clogged for predetermined through channels, and the other end is clogged for the remaining through channels. Therefore, the honeycomb structure can be suitably used as a filter which collects and removes particulate matters contained in a dust-containing fluid, such as a particulate filter for a diesel engine.
    Specifically, if a dust-containing fluid is caused to pass through one end face of the honeycomb structure having such a construction, the dust-containing fluid enters a through channel in the honeycomb structure whose end on the one end face side is not clogged, and passes through the porous wall having a filtering function to enter another through channel in the honeycomb structure whose end on the other end face side is not clogged. When passing through the wall, particulate matters in the dust-containing fluid are collected to the wall, and the purified fluid from which particulate matters have been removed is discharged from the other end face of honeycomb structure.
    If the collected particulate matters accumulate on the wall, the wall is clogged, so that the function as a filter decreases. Therefore, the honeycomb structure is heated periodically by heating means such as a heater to burn and remove the particulate matters, by which the filtering function is regenerated. To accelerate the combustion of particulate matters at the time of regeneration, a metal having a catalytic function, as described later, may be carried on the honeycomb segment.
    On the other hand, in the case where the honeycomb structure in accordance with the present invention is used to purify exhaust gas from a heat engine such as an internal combustion engine or to reform a liquid fuel or a gas fuel as a catalyst carrier, a metal having a catalytic function is carried on the honeycomb segment. As a typical metal having a catalytic function, Pt, Pd, and Rh are cited. At least one kind of these metals is preferably carried on the honeycomb segment.
    Hereunder, the present invention will be described in further detail with reference to examples. The present invention is not limited to these examples.
    [Examples 1 to 10, Comparative example 1]
    Honeycomb structures measuring 144 mm in diameter and 153 mm in length having various division constructions were manufactured using a SiC-made honeycomb segment having a wall thickness of 0.38 mm, a cell density of 200 cells/in2 (31 cells/cm2), and a thickness of outer peripheral portion of 0.5 mm, and using a mixture of ceramic fiber, ceramic powder, and organic and inorganic binders as the joint layer. The division construction and the properties such as the Young's modulus of material of the obtained honeycomb structure are given in Table 1. Also, the surface roughness given in Table 1 indicates the average surface roughness of the whole surface of honeycomb segment in contact with the joint layer.
    This honeycomb structure is a particulate filter for purifying exhaust gas from a diesel engine, which has a construction such that one end is clogged for predetermined through channels, and the other end is clogged for the remaining through channels. The fluid pressure loss test and the regeneration test were conducted on these honeycomb structures. The results are given in Table 1.
    Figure 00150001
    [Evaluation]
    As is apparent from the results given in Table 1, when the requirements specified in the present invention were satisfied, the pressure loss of fluid was not so high, being within the allowable range (10 kPa), and the regeneration time was within the allowable range (15 min).
    Industrial Applicability
    As described above, the honeycomb structure in accordance with the present invention achieves a remarkable effect that a less thermal stress occurs during the use; durability such that no crack develops is ensured; a difference in temperature between the central portion and the outer peripheral portion hardly occurs; and moreover the pressure loss of fluid is low.

    Claims (10)

    1. A honeycomb structure comprising two or more honeycomb segments each of which has a large number of through channels which are partitioned by walls and penetrate in axial directions, the wall of said through channel having a filtering function, and is constructed so that one end is clogged for predetermined through channels, and the other end is clogged for the remaining through channels, and a joint layer for joining said two or more honeycomb segments to each other, characterized in that
         either that the Young's modulus of material of said joint layer is 20% or less of the Young's modulus of material of said honeycomb segment, or that the material strength of said joint layer is lower than the material strength of said honeycomb segment is satisfied.
    2. The honeycomb structure according to claim 1,
      characterized in that a portion having an area of at least 30% of the surface area of said honeycomb segment in contact with said joint layer has an average surface roughness Ra exceeding 0.4 micron.
    3. The honeycomb structure according to claim 1 or 2,
      characterized in that the ratio of the total heat capacity of all the joint layers in said honeycomb structure to the total heat capacity of all the honeycomb segments constituting said honeycomb structure is 30% or lower.
    4. The honeycomb structure according to any one of claims 1 to 3, characterized in that a corner portion of the cross-sectional shape of said honeycomb segment in a cross section perpendicular to the through channel of said honeycomb structure is rounded with a radius of curvature of 0.3 mm or larger, or is chamfered 0.5 mm or more.
    5. The honeycomb structure according to any one of claims 1 to 4, characterized in that the ratio of the total cross-sectional area of said joint layers to the cross-sectional area of said honeycomb structure in a cross section perpendicular to the through channel of said honeycomb structure is 17% or lower.
    6. The honeycomb structure according to any one of claims 1 to 5, characterized in that the ratio of the sum of the cross-sectional areas of said joint layers to the sum of the cross-sectional areas of said walls in a cross section of honeycomb structure perpendicular to the through channel of said honeycomb structure is 50% or lower.
    7. The honeycomb structure according to any one of claims 1 to 6, characterized in that said honeycomb segment has a main crystal phase of one kind selected from a group consisting of cordierite, SiC, SiN, alumina, mullite, and lithium aluminum silicate (LAS).
    8. The honeycomb structure according to any one of claims 1 to 7, characterized in that said honeycomb segment carries a metal having a catalytic function so as to be used to purify exhaust gas from a heat engine or combustion equipment or to reform a liquid fuel or a gas fuel.
    9. The honeycomb structure according to claim 8,
      characterized in that said metal having a catalytic function is at least one kind of Pt. Pd. and Rh.
    10. The honeycomb structure according to any one of claims 1 to 9, characterized in that the cross-sectional shape of said through channel in said honeycomb segment is any of triangle, quadrangle, and hexagon.
    EP01900653A 2000-01-13 2001-01-11 Honeycomb structure Revoked EP1249262B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    JP2000005063 2000-01-13
    JP2000005063A JP3889194B2 (en) 2000-01-13 2000-01-13 Honeycomb structure
    PCT/JP2001/000076 WO2001051173A1 (en) 2000-01-13 2001-01-11 Honeycomb structure

    Publications (3)

    Publication Number Publication Date
    EP1249262A1 true EP1249262A1 (en) 2002-10-16
    EP1249262A4 EP1249262A4 (en) 2005-02-02
    EP1249262B1 EP1249262B1 (en) 2007-01-03

    Family

    ID=18533750

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP01900653A Revoked EP1249262B1 (en) 2000-01-13 2001-01-11 Honeycomb structure

    Country Status (7)

    Country Link
    US (1) US7749458B2 (en)
    EP (1) EP1249262B1 (en)
    JP (1) JP3889194B2 (en)
    AU (1) AU2001225481A1 (en)
    DE (1) DE60125714T2 (en)
    WO (1) WO2001051173A1 (en)
    ZA (1) ZA200205518B (en)

    Cited By (25)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO2004033070A1 (en) * 2002-10-09 2004-04-22 Ngk Insulators, Ltd. Honeycomb structure
    EP1495790A4 (en) * 2002-04-09 2005-01-26 Ibiden Co Ltd Honeycomb filter for clarification of exhaust gas
    EP1437168A4 (en) * 2001-10-15 2006-05-24 Ngk Insulators Ltd HONEYCOMB FILTER
    EP1710015A1 (en) * 2005-04-08 2006-10-11 Ibiden Co., Ltd. Ceramic honeycomb structure
    EP1719881A3 (en) * 2002-02-05 2006-11-22 Ibiden Co., Ltd. Honeycomb filter for exhaust gas decontamination, adhesive, coating material and process for producing honeycomb filter for exhaust gas decontamination
    EP1738814A1 (en) * 2005-06-24 2007-01-03 Ibiden Co., Ltd. Honeycomb structured body
    EP1739288A1 (en) * 2005-06-27 2007-01-03 Ibiden Co., Ltd. Honeycomb structure
    DE102005032348A1 (en) * 2005-07-08 2007-01-11 Emitec Gesellschaft Für Emissionstechnologie Mbh Filter layer, used as part of honeycomb structure for removing particulates from engine exhaust gas, comprises segments joined together so that opposite edges of filter layer have different lengths
    US7309370B2 (en) 2002-02-05 2007-12-18 Ibiden Co., Ltd. Honeycomb filter for exhaust gas decontamination
    EP1717218A4 (en) * 2003-12-26 2008-10-15 Ibiden Co Ltd HONEYCOMB STRUCTURE
    US7553531B2 (en) * 2005-06-24 2009-06-30 Ibiden Co., Ltd. Honeycomb structure
    CN100534617C (en) * 2005-06-24 2009-09-02 揖斐电株式会社 Honeycomb structure body
    US7641955B2 (en) 2005-06-24 2010-01-05 Ibiden Co., Ltd. Honeycomb structured body and exhaust gas converting apparatus
    US7879430B2 (en) 2005-06-24 2011-02-01 Ibiden Co., Ltd Honeycomb structure
    US7879428B2 (en) * 2005-06-24 2011-02-01 Ibiden Co., Ltd Honeycomb structure
    US7879426B2 (en) 2005-06-24 2011-02-01 Ibiden Co., Ltd Honeycomb structure
    US7879427B2 (en) * 2005-06-24 2011-02-01 Ibiden Co., Ltd Honeycomb structure
    US7879429B2 (en) * 2005-06-24 2011-02-01 Ibiden Co., Ltd Honeycomb structure
    US7892623B2 (en) 2005-06-24 2011-02-22 Ibiden Co., Ltd Honeycomb structured body, manufacturing device of honeycomb structured body and manufacturing method of honeycomb structured body
    US7981496B2 (en) 2005-06-24 2011-07-19 Ibiden Co., Ltd Honeycomb structured body
    EP2108430A4 (en) * 2007-02-02 2011-08-24 Ngk Insulators Ltd HONEYCOMB STRUCTURE
    US8110274B2 (en) 2005-06-24 2012-02-07 Ibiden Co., Ltd. Honeycomb structure, honeycomb structure aggregate, and honeycomb structure catalyst
    WO2013038103A1 (en) 2011-09-14 2013-03-21 Saint-Gobain Centre De Recherches Et D'etudes Europeen Honeycomb element with reinforced corners
    EP1489274B2 (en) † 2002-03-04 2013-06-05 Ibiden Co., Ltd. Use of a honeycomb filter for exhaust gas purification
    WO2013082336A1 (en) * 2011-11-30 2013-06-06 Corning Incorporated Pass -through catalytic substrate including flow channels having beveled corner and manufacturing method

    Families Citing this family (53)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    JP2002018290A (en) * 2000-07-12 2002-01-22 Hitachi Metals Ltd Carrier for ceramic honeycomb structure catalyst and ceramic honeycomb structure catalyst converter using the same
    JP4404497B2 (en) * 2001-03-01 2010-01-27 日本碍子株式会社 Honeycomb filter and manufacturing method thereof
    JP2003010616A (en) * 2001-06-29 2003-01-14 Ngk Insulators Ltd Honeycomb structure
    WO2003031371A1 (en) * 2001-10-02 2003-04-17 Ngk Insulators, Ltd. Honeycomb structural body and method of manufacturing the structural body
    JP3893049B2 (en) 2001-11-20 2007-03-14 日本碍子株式会社 Honeycomb structure and manufacturing method thereof
    ATE376880T1 (en) * 2002-03-22 2007-11-15 Ibiden Co Ltd PRODUCTION PROCESS OF A HONEYCOMB FILTER FOR CLEANING EXHAUST GAS
    EP1829595A1 (en) * 2002-03-29 2007-09-05 Ibiden Co., Ltd. Ceramic filter and exhaust gas decontamination unit
    WO2004024295A1 (en) 2002-09-13 2004-03-25 Ibiden Co., Ltd. Honeycomb structure
    KR101025849B1 (en) 2003-03-19 2011-03-30 엔지케이 인슐레이터 엘티디 Honeycomb Structure
    JP4267947B2 (en) * 2003-03-19 2009-05-27 日本碍子株式会社 Honeycomb structure
    JP4773043B2 (en) * 2003-03-28 2011-09-14 日本碍子株式会社 Ceramic filter structure
    JP2005144250A (en) * 2003-11-12 2005-06-09 Ngk Insulators Ltd Honeycomb structure body
    CN1906141B (en) * 2004-12-27 2010-11-03 揖斐电株式会社 Honeycomb structure and sealing material layer
    JP4870559B2 (en) * 2005-03-28 2012-02-08 イビデン株式会社 Honeycomb structure
    JP4753782B2 (en) * 2005-06-24 2011-08-24 イビデン株式会社 Honeycomb structure
    CN101076404B (en) * 2005-06-27 2010-05-12 揖斐电株式会社 Honeycomb structure body
    JP5469305B2 (en) 2005-12-14 2014-04-16 日本碍子株式会社 Bonding material, manufacturing method thereof, and honeycomb structure using the same
    KR100779893B1 (en) * 2005-12-29 2007-11-28 이비덴 가부시키가이샤 Honeycomb Structures, Honeycomb Structure Aggregates, and Honeycomb Catalysts
    EP1806329A3 (en) * 2006-01-05 2008-09-03 Asahi Glass Company, Limited Composition for ceramic bonding and ceramic bonded article
    EP2006265B1 (en) * 2006-03-24 2018-01-03 NGK Insulators, Ltd. Bonded body
    KR101081638B1 (en) 2006-03-30 2011-11-09 엔지케이 인슐레이터 엘티디 Bonded element, honeycomb segment bonded element, and honeycomb structure using the same
    DE102006043706A1 (en) * 2006-09-18 2008-03-27 Robert Bosch Gmbh Filter element, in particular for filtering exhaust gases of an internal combustion engine
    DE102006045164A1 (en) * 2006-09-25 2008-04-03 Robert Bosch Gmbh Filter element, in particular for filtering exhaust gases of an internal combustion engine
    EP1930061B1 (en) 2006-12-07 2018-10-03 NGK Insulators, Ltd. Bonding material composition and method for manufacturing the same, and joined body and method for manufacturing the same
    EP1939261B1 (en) 2006-12-25 2010-03-31 Ngk Insulators, Ltd. Joined body and method for manufacturing the same
    WO2008096851A1 (en) 2007-02-08 2008-08-14 Ngk Insulators, Ltd. Joining material composition, method for production of the joining material composition, jointed article, and method for production of the jointed article
    JP5478243B2 (en) 2007-03-26 2014-04-23 日本碍子株式会社 Bonding material composition and method for producing the same, joined body and method for producing the same
    JP2008272731A (en) * 2007-03-30 2008-11-13 Ibiden Co Ltd Catalyst carrier
    WO2008126306A1 (en) * 2007-03-30 2008-10-23 Ibiden Co., Ltd. Catalyst support
    EP2160231A2 (en) * 2007-05-04 2010-03-10 Dow Global Technologies Inc. Improved honeycomb filters
    JP5149036B2 (en) * 2008-02-29 2013-02-20 東京窯業株式会社 Ceramic honeycomb structure
    JP5345422B2 (en) 2008-03-21 2013-11-20 日本碍子株式会社 Honeycomb structure defect inspection system
    WO2009118811A1 (en) * 2008-03-24 2009-10-01 イビデン株式会社 Honeycomb structure
    EP2113643B1 (en) * 2008-03-24 2012-01-25 Ibiden Co., Ltd. Honeycomb structured body
    WO2009118810A1 (en) * 2008-03-24 2009-10-01 イビデン株式会社 Honeycomb structure
    JP2009255030A (en) * 2008-03-27 2009-11-05 Ibiden Co Ltd Honeycomb structure
    WO2009118875A1 (en) 2008-03-27 2009-10-01 イビデン株式会社 Honeycomb structure
    USD647607S1 (en) 2008-05-27 2011-10-25 Ibiden Co., Ltd. Particulate filter for diesel engine
    USD609319S1 (en) 2008-06-19 2010-02-02 Ibiden Co., Ltd. Particulate filter for diesel engine
    USD609320S1 (en) 2008-06-19 2010-02-02 Ibiden Co., Ltd. Particulate filter for diesel engine
    JP5600245B2 (en) 2009-03-30 2014-10-01 日本碍子株式会社 Honeycomb segment assembly
    WO2011125768A1 (en) * 2010-03-31 2011-10-13 日本碍子株式会社 Honeycomb filter
    EP2656903B1 (en) * 2010-12-24 2016-10-19 NGK Insulators, Ltd. Honeycomb structure
    EP2656901B1 (en) * 2010-12-24 2020-04-29 NGK Insulators, Ltd. Honeycomb structure
    JP5511865B2 (en) * 2012-02-13 2014-06-04 日立造船株式会社 Exhaust gas denitration equipment for diesel engines
    JP6043286B2 (en) 2012-02-24 2016-12-14 日本碍子株式会社 Honeycomb structure
    JP5844672B2 (en) 2012-03-28 2016-01-20 日本碍子株式会社 Honeycomb structure
    JP6013101B2 (en) * 2012-09-18 2016-10-25 日野自動車株式会社 Exhaust purification device
    JP6344291B2 (en) * 2015-04-02 2018-06-20 株式会社デンソー Honeycomb structure
    WO2017168919A1 (en) 2016-03-30 2017-10-05 バンドー化学株式会社 Method for producing belt, and two-layer bonding machine
    USD1004622S1 (en) * 2018-02-20 2023-11-14 Ngk Insulators, Ltd. Catalyst carrier for exhaust gas purification
    CN108859272B (en) * 2018-09-10 2024-07-16 中国空气动力研究与发展中心超高速空气动力研究所 Support structure for aluminum flake interlayer and aluminum flake interlayer
    JP7594398B2 (en) * 2020-09-24 2024-12-04 イビデン株式会社 Electrically heated catalyst

    Family Cites Families (20)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    JPH07102483B2 (en) 1984-12-28 1995-11-08 いすゞ自動車株式会社 Gear processing method
    US2337691A (en) 1942-04-29 1943-12-28 Lapp Insulator Company Inc Method of making high strength ceramic surfaces
    JPS54150406A (en) 1978-05-18 1979-11-26 Nippon Soken Ceramic honeycomb structure
    JPS5546338A (en) 1978-09-28 1980-04-01 Ngk Insulators Ltd Heat and shock resistant, revolving and heat-regenerating type ceramic heat exchanger body and its manufacturing
    JPS60141668A (en) 1983-12-28 1985-07-26 日本碍子株式会社 Material for ceramic honeycomb structure
    JPH03121213A (en) * 1989-09-30 1991-05-23 Ibiden Co Ltd Honeycomb filter for exhaust gas purifying device
    US5629067A (en) 1992-01-30 1997-05-13 Ngk Insulators, Ltd. Ceramic honeycomb structure with grooves and outer coating, process of producing the same, and coating material used in the honeycomb structure
    JPH06241017A (en) 1993-02-12 1994-08-30 Nissan Diesel Motor Co Ltd Trap filter device for particulate
    DE9422394U1 (en) 1993-04-16 2001-07-05 Rexroth Star Gmbh A linear guide unit
    JP2726616B2 (en) 1993-12-15 1998-03-11 日本碍子株式会社 Porous ceramic honeycomb filter
    JP3121497B2 (en) 1994-07-14 2000-12-25 イビデン株式会社 Ceramic structure
    JP3589308B2 (en) 1994-07-14 2004-11-17 イビデン株式会社 Exhaust gas purification device
    US5552102A (en) 1994-12-16 1996-09-03 Corning Incorporated Method and apparatus for extruding large honeycombs
    JP3707843B2 (en) 1995-12-08 2005-10-19 株式会社日本自動車部品総合研究所 Diesel exhaust gas purification filter
    US5914187A (en) * 1996-01-12 1999-06-22 Ibiden Co., Ltd. Ceramic structural body
    JP3967034B2 (en) 1999-03-30 2007-08-29 イビデン株式会社 Manufacturing method of ceramic filter unit
    DE60033977T2 (en) * 1999-09-29 2007-12-20 Ibiden Co., Ltd., Ogaki Honeycomb filter and arrangement of ceramic filters
    JP4404497B2 (en) * 2001-03-01 2010-01-27 日本碍子株式会社 Honeycomb filter and manufacturing method thereof
    US6764743B2 (en) 2001-05-01 2004-07-20 Ngk Insulators, Ltd. Porous honeycomb structure and process for production thereof
    CN100537482C (en) * 2005-06-24 2009-09-09 揖斐电株式会社 honeycomb structure

    Cited By (41)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP1437168A4 (en) * 2001-10-15 2006-05-24 Ngk Insulators Ltd HONEYCOMB FILTER
    US8128722B2 (en) 2002-02-05 2012-03-06 Ibiden Co., Ltd. Honeycomb filter for purifying exhaust gases, adhesive, coating material, and manufacturing method of honeycomb filter for purifying exhaust gases
    US7309370B2 (en) 2002-02-05 2007-12-18 Ibiden Co., Ltd. Honeycomb filter for exhaust gas decontamination
    US8029737B2 (en) 2002-02-05 2011-10-04 Ibiden Co., Ltd. Honeycomb filter for exhaust gas decontamination, adhesive, coating material and process for producing honeycomb filter for exhaust gas decontamination
    EP1719881A3 (en) * 2002-02-05 2006-11-22 Ibiden Co., Ltd. Honeycomb filter for exhaust gas decontamination, adhesive, coating material and process for producing honeycomb filter for exhaust gas decontamination
    EP1726796A1 (en) * 2002-02-05 2006-11-29 Ibiden Co., Ltd. Honeycomb filter for purifying exhaust gases, adhesive, coating material, and manufacturing method of honeycomb filter for purifying exhaust gases
    EP1489274B2 (en) † 2002-03-04 2013-06-05 Ibiden Co., Ltd. Use of a honeycomb filter for exhaust gas purification
    EP1495790A4 (en) * 2002-04-09 2005-01-26 Ibiden Co Ltd Honeycomb filter for clarification of exhaust gas
    US7396576B2 (en) 2002-10-09 2008-07-08 Ngk Insulators, Ltd. Honeycomb structure
    WO2004033070A1 (en) * 2002-10-09 2004-04-22 Ngk Insulators, Ltd. Honeycomb structure
    US7811650B2 (en) 2003-12-26 2010-10-12 Ibiden Co., Ltd. Honeycomb structure
    EP1717218A4 (en) * 2003-12-26 2008-10-15 Ibiden Co Ltd HONEYCOMB STRUCTURE
    EP1710015A1 (en) * 2005-04-08 2006-10-11 Ibiden Co., Ltd. Ceramic honeycomb structure
    US7556666B2 (en) 2005-04-08 2009-07-07 Ibiden Co., Ltd. Honeycomb structure
    US7879428B2 (en) * 2005-06-24 2011-02-01 Ibiden Co., Ltd Honeycomb structure
    US7981496B2 (en) 2005-06-24 2011-07-19 Ibiden Co., Ltd Honeycomb structured body
    EP1738814A1 (en) * 2005-06-24 2007-01-03 Ibiden Co., Ltd. Honeycomb structured body
    CN100534617C (en) * 2005-06-24 2009-09-02 揖斐电株式会社 Honeycomb structure body
    US7851041B2 (en) 2005-06-24 2010-12-14 Ibiden Co., Ltd. Honeycomb structure
    US7879430B2 (en) 2005-06-24 2011-02-01 Ibiden Co., Ltd Honeycomb structure
    US7553531B2 (en) * 2005-06-24 2009-06-30 Ibiden Co., Ltd. Honeycomb structure
    US7879426B2 (en) 2005-06-24 2011-02-01 Ibiden Co., Ltd Honeycomb structure
    US8232227B2 (en) 2005-06-24 2012-07-31 Ibiden Co., Ltd. Honeycomb structured body
    US7879427B2 (en) * 2005-06-24 2011-02-01 Ibiden Co., Ltd Honeycomb structure
    US7879429B2 (en) * 2005-06-24 2011-02-01 Ibiden Co., Ltd Honeycomb structure
    CN101001698B (en) * 2005-06-24 2011-02-09 揖斐电株式会社 Honeycomb structure body
    US7892623B2 (en) 2005-06-24 2011-02-22 Ibiden Co., Ltd Honeycomb structured body, manufacturing device of honeycomb structured body and manufacturing method of honeycomb structured body
    US7641955B2 (en) 2005-06-24 2010-01-05 Ibiden Co., Ltd. Honeycomb structured body and exhaust gas converting apparatus
    US8110274B2 (en) 2005-06-24 2012-02-07 Ibiden Co., Ltd. Honeycomb structure, honeycomb structure aggregate, and honeycomb structure catalyst
    EP1739288A1 (en) * 2005-06-27 2007-01-03 Ibiden Co., Ltd. Honeycomb structure
    US7879432B2 (en) * 2005-06-27 2011-02-01 Ibiden Co., Ltd. Honeycomb structure
    DE102005032348A1 (en) * 2005-07-08 2007-01-11 Emitec Gesellschaft Für Emissionstechnologie Mbh Filter layer, used as part of honeycomb structure for removing particulates from engine exhaust gas, comprises segments joined together so that opposite edges of filter layer have different lengths
    US7713322B2 (en) 2005-07-08 2010-05-11 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Filter layer for an, in particular conical, honeycomb body for exhaust gas treatment, method for manufacturing the filter layer, honeycomb body and exhaust gas purification device
    EP2108430A4 (en) * 2007-02-02 2011-08-24 Ngk Insulators Ltd HONEYCOMB STRUCTURE
    WO2013038103A1 (en) 2011-09-14 2013-03-21 Saint-Gobain Centre De Recherches Et D'etudes Europeen Honeycomb element with reinforced corners
    US9546115B2 (en) 2011-09-14 2017-01-17 Saint-Gobain Centre De Recherches Et D'etudes Europeen Honeycomb element with reinforced corners
    WO2013082336A1 (en) * 2011-11-30 2013-06-06 Corning Incorporated Pass -through catalytic substrate including flow channels having beveled corner and manufacturing method
    US8865084B2 (en) 2011-11-30 2014-10-21 Corning Incorporated Pass-through catalytic substrate including porous ceramic beveled corner portions and methods
    CN104245134A (en) * 2011-11-30 2014-12-24 康宁股份有限公司 Flow-through catalytic substrate comprising flow channels with beveled angles and method of manufacture
    US8992821B2 (en) 2011-11-30 2015-03-31 Corning Incorporated Pass-through catalytic substrate including porous ceramic beveled corner portions and methods
    CN104245134B (en) * 2011-11-30 2016-11-16 康宁股份有限公司 Flow-through catalytic substrate comprising flow channels with beveled angles and method of manufacture

    Also Published As

    Publication number Publication date
    US7749458B2 (en) 2010-07-06
    WO2001051173A1 (en) 2001-07-19
    AU2001225481A1 (en) 2001-07-24
    JP2001190916A (en) 2001-07-17
    DE60125714D1 (en) 2007-02-15
    JP3889194B2 (en) 2007-03-07
    US20020197193A1 (en) 2002-12-26
    ZA200205518B (en) 2003-08-18
    EP1249262B1 (en) 2007-01-03
    DE60125714T2 (en) 2007-11-08
    EP1249262A4 (en) 2005-02-02

    Similar Documents

    Publication Publication Date Title
    US7749458B2 (en) Honeycomb structure
    EP1247556B1 (en) Triangular cell honeycomb structure
    JP4094823B2 (en) Honeycomb structure and assembly thereof
    US7037567B2 (en) Honeycomb structure
    US7316722B2 (en) Honeycomb structure
    JP4455800B2 (en) Honeycomb structure
    US7138002B2 (en) Honeycomb structure and process for production thereof
    US7179516B2 (en) Honeycomb filter
    JP5639343B2 (en) Honeycomb catalyst body
    EP1382374A1 (en) Honeycomb structural body and assembly thereof
    JP4511071B2 (en) Honeycomb structure and assembly thereof
    JP6246683B2 (en) Honeycomb filter
    JP4511070B2 (en) Honeycomb structure and assembly thereof
    JP2008307456A (en) Honeycomb structure
    JP2010188231A (en) Honeycomb structure
    JP5148962B2 (en) Honeycomb structure
    JP5526071B2 (en) Porous ceramic filter and exhaust gas purification device
    JP2008137872A (en) Honeycomb structure
    PL203681B1 (en) Honeycomb filter

    Legal Events

    Date Code Title Description
    PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

    Free format text: ORIGINAL CODE: 0009012

    17P Request for examination filed

    Effective date: 20020718

    AK Designated contracting states

    Kind code of ref document: A1

    Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

    AX Request for extension of the european patent

    Free format text: AL;LT;LV;MK;RO;SI

    RBV Designated contracting states (corrected)

    Designated state(s): BE DE FR

    A4 Supplementary search report drawn up and despatched

    Effective date: 20041221

    17Q First examination report despatched

    Effective date: 20050701

    GRAP Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOSNIGR1

    GRAS Grant fee paid

    Free format text: ORIGINAL CODE: EPIDOSNIGR3

    GRAA (expected) grant

    Free format text: ORIGINAL CODE: 0009210

    AK Designated contracting states

    Kind code of ref document: B1

    Designated state(s): BE DE FR

    REF Corresponds to:

    Ref document number: 60125714

    Country of ref document: DE

    Date of ref document: 20070215

    Kind code of ref document: P

    ET Fr: translation filed
    PLBI Opposition filed

    Free format text: ORIGINAL CODE: 0009260

    PLAX Notice of opposition and request to file observation + time limit sent

    Free format text: ORIGINAL CODE: EPIDOSNOBS2

    26 Opposition filed

    Opponent name: THE DOW CHEMICAL COMPANY

    Effective date: 20071002

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: BE

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20070103

    PLAF Information modified related to communication of a notice of opposition and request to file observations + time limit

    Free format text: ORIGINAL CODE: EPIDOSCOBS2

    PLBB Reply of patent proprietor to notice(s) of opposition received

    Free format text: ORIGINAL CODE: EPIDOSNOBS3

    RDAF Communication despatched that patent is revoked

    Free format text: ORIGINAL CODE: EPIDOSNREV1

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: DE

    Payment date: 20090130

    Year of fee payment: 9

    APBM Appeal reference recorded

    Free format text: ORIGINAL CODE: EPIDOSNREFNO

    APBP Date of receipt of notice of appeal recorded

    Free format text: ORIGINAL CODE: EPIDOSNNOA2O

    APAH Appeal reference modified

    Free format text: ORIGINAL CODE: EPIDOSCREFNO

    APBU Appeal procedure closed

    Free format text: ORIGINAL CODE: EPIDOSNNOA9O

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: FR

    Payment date: 20090106

    Year of fee payment: 9

    RDAG Patent revoked

    Free format text: ORIGINAL CODE: 0009271

    STAA Information on the status of an ep patent application or granted ep patent

    Free format text: STATUS: PATENT REVOKED

    27W Patent revoked

    Effective date: 20090804